EP1089876B1 - Kunststoffverglasung mit umgossenem kunststoffrahmenelement - Google Patents

Kunststoffverglasung mit umgossenem kunststoffrahmenelement Download PDF

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Publication number
EP1089876B1
EP1089876B1 EP99925119A EP99925119A EP1089876B1 EP 1089876 B1 EP1089876 B1 EP 1089876B1 EP 99925119 A EP99925119 A EP 99925119A EP 99925119 A EP99925119 A EP 99925119A EP 1089876 B1 EP1089876 B1 EP 1089876B1
Authority
EP
European Patent Office
Prior art keywords
plastic
product
product according
layer
skin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99925119A
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English (en)
French (fr)
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EP1089876A1 (de
Inventor
Jean-Louis Bravet
Rym Benyahia
Bernard Bureau
Fabrice Ducreusot
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Saint Gobain Glass France SAS
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14811—Multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0087—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0093—Other properties hydrophobic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3052—Windscreens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/778—Windows
    • B29L2031/7782—Glazing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/249933—Fiber embedded in or on the surface of a natural or synthetic rubber matrix
    • Y10T428/249939—Two or more layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31507—Of polycarbonate

Definitions

  • the present invention relates to plastic products, essentially flat and at least partly transparent, which are adapted by their high optical quality to an application as glazing.
  • plastics are lighter, which is a decisive advantage for urban electric vehicles, as an increase in their autonomy is crucial.
  • the lightness of the transparent surfaces is interesting in relation to modern transport vehicles, as technical progress goes hand in hand with the integration of more and more functions into the glazing (rear window heating, radio antenna, Windshield de-icing, coloring to prevent warming of the passenger compartment in case of strong sunlight, incorporation of electrochromic compounds, display of information on the windshield ...), and with ever-increasing glass surfaces. This results in a general increase of the harmful vehicle in terms of energy consumption.
  • the plastics are likely to provide, compared to the glass, improved safety conditions, and protection against theft higher, because of their superior resilience.
  • a major advantage of plastics over glass is their superior ability to be easily transformed into complex shapes.
  • plastic sheets to be more or less deformed in a reversible manner, allows to consider modes of installation in bays bodyshell considerably simplified, with ratcheting, from the inside as well as from the outside of the vehicle.
  • thermoforming is carried out by contact with at least one solid surface of the mold and, optionally, using compressed air or with suction.
  • the devices used are bulky and, in particular, excessive lengths. Yields are relatively low and material losses inevitable. High product quality is achieved only at the expense of difficult process development and, possibly, additional resurfacing treatment.
  • the stripiness of plastics is such that, in their optical applications or in transparent elements, it is necessary to coat the shaped parts with a hard varnish.
  • the new glazing made available consists essentially of a first plastic material and has at least one appendix overmolded in a second plastic material.
  • adhesion to the first plastic material ability to elastic deformation, sealing, reversibility of a durable crushing, rigidity, flexural strength, mechanical resistance ( in particular crushing or compression) ...
  • the addition of overmoulded plastic material can be located on one or both sides of the flat product: it can be an inner mirror base molded on a plastic windshield, or an appendage positioning, centering or any location, or a mounting stud.
  • At least part of the plastic addition is encapsulated at the periphery of the product.
  • This encapsulate consists, possibly, in a peripheral seal, including a lip perfectly matching the bodywork bay, assumes a sealing function, a fixing stud, a peripheral belt stiffening ...
  • the product of the invention has a plastic core, a skin which comprises at least one plastic film supporting an anti-scratch layer and disposed on at least one side of the recessed core with respect to the edges thereof. ci, inside the surface delimited by the encapsulated peripheral portion of the addition of plastic material.
  • thermoplastics such as polycarbonate, poly (methyl methacrylate), ethylene / vinyl acetate copolymer, poly (ethylene glycol terephthalate), poly (butylene glycol terephthalate), polycarbonate / polyester copolymers, polyurethane, cycloolefin copolymer of ethylene / norbornene type, or ethylene / cyclopentadiene, ionomeric resins, for example an ethylene / (meth) acrylic acid neutralized with a polyamine, thermosetting or thermocurable such as polyurethane, unsaturated polyester, ethylene / vinyl acetate copolymer.
  • a conventional thermoplastic preferably injectable, at relatively low softening temperature and cheap, such as polycarbonate.
  • the core may also consist of a combination of several thicknesses of one or more of the aforementioned plastics.
  • the thickness of the skin, or of each of the two skins is advantageously chosen at most equal to 500 ⁇ m, preferably between 50 and 300 ⁇ m, the skin consisting of one or more films made of thermoformable plastic material, between which is interposed, or on which is deposited where appropriate at least one functional layer, at least one of these films can also be itself such a functional layer.
  • the anti-scratch layer has a thickness of the order of 1 to 10 microns; it generally forms the outer surface of the product of the invention.
  • It may be essentially inorganic and consist in particular of polysiloxanes and / or of silica and / or alumina derivatives, or mixed, such as constituted by networks of mineral and organic molecular chains intertwined and connected to each other by means of silicon bonds. -carbon.
  • a mixed layer has excellent properties of transparency, adhesion and scratch resistance. It seems that the mineral network gives the coating its hardness and its resistance to scratches, the organic network its elasticity and its resilience.
  • varnishes are well known and have been described in published applications EP-A1-0 524 417 and EP-A1-0 718 348, the teaching of which is hereby incorporated by reference; some are referred to as "Ormocer” which is an abbreviation for "Organically Modified Ceramic". It is remarkable that the cooking temperature of the Ormocers is easily adaptable by varying the relative proportions between the organic polymer fraction and the mineral fraction. The use of a larger number of plastics becomes possible to form the support film.
  • the functional layers that can be integrated into a skin are of various natures.
  • the outer layer of the skin in contact with the environment, contains a hydrophobic / oleophobic agent which thus confers this property on the outer surface of the product.
  • hydrophobic / oleophobic agent the fluorinated polysilanes, in particular obtained from precursors comprising at one end a hydrolysable function of alkoxy type, or halogen used for chemical bonding to the substrate and a perfluorinated carbon chain at the end, are well known. other end, intended to constitute the outer surface of the product.
  • the hydrophobic / oleophobic agent is, in order of decreasing preference, incorporated into the anti-scratch layer, which has a chemical structure close to its own, or with which it is at least chemically compatible, or grafted in the form of a thin layer with a thickness of between 2 and 50 nm, preferably on the anti-scratch layer or even self-supported on a plastic film, such as polyvinyl fluoride (PVF) or polyvinylidene fluoride ) (PVDF), to advantageously apply directly to the anti-scratch layer.
  • PVDF polyvinyl fluoride
  • At least one decorative and / or masking layer, covering all or part of the surface of the product is positioned in the skin, preferably directly under the support film of the anti-scratch layer.
  • This layer may, for example, replace the serigraphed decor deposited frequently on the periphery of the inner face of glazing, especially for motor vehicles, for the purpose of masking, for an observer located outside the vehicle, the bodywork elements forming the frame of the bay and the bead of glue which is thus protected from degradation by ultraviolet radiation. It can comprise elements of opaque or transparent colored decoration, making it possible to produce colored elements matching the bodywork or the equipment interior, logos, etc.
  • the skin may be provided with an adhesion layer, in particular on its inner side to ensure the attachment with the core, but also between two films or layers of the skin.
  • adhesion layer in particular on its inner side to ensure the attachment with the core, but also between two films or layers of the skin.
  • Common adhesives are polyvinyl butyral, polyurethane or acrylic adhesives.
  • the optically selective layers which are stacked, for example under the decorative and / or masking layer, or above the latter under the support film of the anti-scratch layer, or well even above the anti-scratch layer.
  • These layers are distinguished by high transmission in the visible range (wavelengths from 400 to 800 nm) and high absorption and / or reflection in the ultraviolet ( ⁇ 400 nm) and infrared (> 800 nm) range.
  • These layers may consist of thin metal layers, for example silver-based, with thicknesses of between 2 and 35 nm, separated from each other and from other adjacent layers or films by dielectric layers of oxides or nitrides. indium, tin, silicon, zinc, titanium, tungsten, tantalum, niobium, aluminum, zirconium ..., of thickness generally between 10 and 150 nm.
  • These layers may comprise at least one colored layer in the mass.
  • All of these layers can be electrically conductive; it can belong to the family of anti-solar stacks, used to limit the heat input by solar radiation in closed spaces or that of the low-emissive stacks, used on the contrary to limit the loss of heat in closed spaces, mainly due to a transmission of infrared radiation through the glazing.
  • anti-solar stacks used to limit the heat input by solar radiation in closed spaces or that of the low-emissive stacks, used on the contrary to limit the loss of heat in closed spaces, mainly due to a transmission of infrared radiation through the glazing.
  • the skin is provided with a stack of antireflection layers.
  • This stack may comprise, for example, a fluoride or an aluminum oxyfluoride capable of being deposited in a thin layer by a vacuum technique of the cathode sputtering type, possibly assisted by a magnetic field.
  • Stacking is described in FR 2,745,284, the teaching of which is incorporated herein by reference.
  • plastics and in particular polycarbonate, styrene / ethylene / butylene / modified styrene copolymer, polyurethane-acrylic alloy.
  • the subject of the invention is also a first method of manufacturing the product described above, in which the injection of a first and then a second plastic material is carried out in a single mold, the first plastic being of the soul, and the second that of the encapsulated addition.
  • This method has the merit of limiting the number of injection machines used and the corresponding size and to reduce the manufacturing time, that is to say finally to increase the yields.
  • the product is not subject to any handling, does not have to be subsequently dusted.
  • this method comprises a transfer operation by rotation of the product of the injection of the first material. plastic, from a first imprint where has previously occurred the injection of the first plastic material in a second cavity for the subsequent injection of the second plastic material.
  • a mold having n fingerprints distributed at an angular deviation of 2 ⁇ / n relative to the axis of rotation can be used. More specifically, it is a mold similar to the multi-injection mold with rotating mobile part with imprint, or rotary magazine described in FR-B1-2 725 152, whose teaching is incorporated here as a reference.
  • the product of the invention is produced by injecting a first plastic material into a first mold and then transferring the product of this injection into a second mold, in which is injected a second plastic material.
  • This method does not exclude additional injection operations, separated each time by a transfer or manipulation of the product. It does not exclude a process comprising successively an injection in a mold, the withdrawal of this mold from the product of the injection, the transformation of this mold by removal of removable parts of volume corresponding to that of the next injection, the repositioning of the product of the injection in this mold, and finally the following injection.
  • the manufacturing processes of the product of the invention avoid the pitfall of the insufficient optical quality of the products commonly obtained by extrusion.
  • the one or both skins comprising their film of material plastics supporting an anti-scratch layer are initially made flat on a support, so that their face provided with the anti-scratch varnish formation is free from any mechanical contact, at least over their extent for which a quality Optical is required.
  • a state of cohesion of the skin and a degree of hardening of the intermediate and controllable anti-scratch varnish are then achieved.
  • the skin is thermoformed, always in the absence of any mechanical contact of the face provided with the anti-scratch coating, or on the contrary with contact. This results in both a shaping of the skin, and the completion of the hardening of the anti-scratch coating.
  • the process resulting in a perfect cohesion of the skin ends with its cooling.
  • thermoformed skins are then advantageously maintained at the bottom of the mold by any appropriate means such as suction, blowing or electrostatic effect, several of these means possibly being associated, before the injection of the first plastic material constituting the core of the mold. product of the invention.
  • the skin comprises an electrically conductive network
  • it is preferably formed beforehand by screen printing of metal.
  • the invention also relates to the application of the product described above as glazing for the building or transport vehicles, in particular for the automobile.
  • the coated support film is then placed at the bottom of a mold, the layer anti-scratch being positioned above; the whole is subjected to a heat treatment of 155 ° C for 30 min.
  • a skin in the sense of the preferred embodiment of the present invention is then formed in its almost definitive form.
  • thermoplastic injection is then carried out on a 3.5 mm thick layer of polycarbonate marketed by the company General Electric under the reference GE 121 R.
  • the rotary magazine of the mold is activated on 180 °, so that the product of the injection of the polycarbonate is found positioned on a second footprint.
  • a modified styrene / ethylene / butylene / styrene copolymer 75 Shore A hardness is then injected so as to form a molded section over the entire periphery of the polycarbonate sheet.
  • Example 1 The procedure of Example 1 is reproduced with a 325 ⁇ m thick film of the same standard polycarbonate provided, on one side, with an anti-scratch coating marketed by Societe Generale Electric under the reference HP 92.
  • Screen printing is carried out on the periphery by means of epoxy-based ink.
  • the film is cut according to the silkscreen. Its dimensions are such that it is set back from the edges of the subsequently injected core, as previously specified.
  • the film is placed in the mold cavity. It is then proceeded to the injection of the polycarbonate core, then the peripheral addition according to operations identical to those of Example 1.
  • the final product has a transparency, optical quality amply sufficient for application as glazing.
  • the method of the invention has the advantages inherent to the injection technique.
  • the encapsulated addition does not necessarily cover the entire periphery of the soul.
  • the excellent adhesion of the encapsulated addition to the polycarbonate core corresponds to a peel force at 90 ° of the order of 100 N / cm, with a cohesive rupture in the material. encapsulate (i.e., it tears in the thickness of the tongue used in the peel test.)
  • the award-winning glass adhesion corresponds to a 90 ° peel force of 30-40 N / cm, but is almost zero on plastic.
  • the method of the invention does not exclude to conform the core with a peripheral bead to increase the rigidity, or with a relief and / or extensions such as ribs, profiles, legs or ears, and / or to have within the plastic one or more inserts, including metal.
  • This arrangement is particularly useful for gripping or fixing the product of the invention, as well as for the final assembly for which it is intended, as in a car body berry.
  • the formation of suitable peripheral profiles makes it possible to envisage assembly of the product by the interior of the vehicle, that is to say by the passenger compartment.
  • the bead of glue is then placed under the edge of the bay bodywork and is not exposed to sunlight.
  • the protection of the adhesive bead by a varnish formed on the periphery of the inner face of the sheet naturally becomes superfluous.
  • the appendages formed at the periphery of the product during its injection may be preserved, or sawed in whole or in part according to their use. Sanding can be provided after such sawing.
  • a peripheral profile of geometry symmetrical with respect to the plane of the product may be appropriate, for example in the case of lateral transparent surfaces of transport vehicles, one or the other part of the profile being able to be sawn later, depending on whether it is is the right or left transparent element.
  • any inserts may be related to the incorporation into the product of particular functions, such as a stoplight in a rear window.
  • the method of the invention is therefore economical, easy and reliable and allows the use of many combinations of constituents, without the problem of their compatibility, especially in terms of their operating temperatures, does arise.
  • the use of a rotating part mold makes it possible to obtain plastic glazings equipped with an encapsulate, in particular an elastomer, with short production times and high yields, for a minimal investment in apparatus and machines, while maintaining the optical quality required.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Window Of Vehicle (AREA)

Claims (16)

  1. Erzeugnis, das im Wesentlichen flach ist, aus Kunststoff besteht, wenigstens teilweise transparent ist, wovon mindestens ein Teil der Außenfläche von einem Kunststoffzusatz gebildet wird, der aufgeformt ist und den Umfang des Erzeugnisses wenigstens teilweise ummantelt, und welches außerdem einen Kunststoffkern und eine Außenschicht umfasst, die auf mindestens einer Seite des Kerns angeordnet, in Bezug auf den Rand dieser Seite zurückgesetzt und in der Oberfläche von dem Umfangsbereich, der von dem Kunststoffzusatz ummantelt wird, begrenzt ist und darüber hinaus mindestens einen Kunststofffilm umfasst, der eine kratzfeste Schicht trägt.
  2. Erzeugnis nach Anspruch 1, dadurch gekennzeichnet, dass die Außenschicht, deren Dicke höchstens 500 µm und vorzugsweise 50 bis 300 µm beträgt, aus einem oder mehreren thermoplastischen Kunststofffilmen besteht, zwischen welchen mindestens eine Funktionsschicht eingefügt oder auf welchen gegebenenfalls mindestens eine solche aufgebracht ist, wobei weiterhin mindestens einer dieser Filme selbst eine derartige Funktionsschicht bilden kann.
  3. Erzeugnis nach Anspruch 2, dadurch gekennzeichnet, dass der Thermoplast aus Polycarbonat, Polypropylen, Polymethylmethacrylat, Ethylen-Vinylacetat-Copolymer, Polyethylenterephthalat, Polyurethan, Polyvinylbutyral und cycloolefinischem Copolymer ausgewählt ist.
  4. Erzeugnis nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Außenschicht die hydrophobe/oleophobe Funktion umfasst, die in die kratzfeste Schicht eingebaut bzw. auf diese aufgepfropft worden ist oder diese über einen die hydrophobe/oleophobe Schicht tragenden Kunststofffilm bedeckt.
  5. Erzeugnis nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Außenschicht auf ihrer gesamten oder einem Teil ihrer Oberfläche eine verschönernde und/oder verdeckende Schicht umfasst, die vorzugsweise direkt unter dem die kratzfeste Schicht tragenden Film angeordnet ist.
  6. Erzeugnis nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Außenschicht eine oder mehrere optisch selektive Schichten umfasst.
  7. Erzeugnis nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Außenschicht einen Antireflexschichtaufbau umfasst.
  8. Erzeugnis nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Außenschicht ein elektrisch leitfähiges Netz enthält.
  9. Erzeugnis nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Kern aus einem Thermoplast wie Polycarbonat, Polymethylmethacrylat, Ethylen-Vinylacetat-Copolymer, Polyethylenterephthalat, Polyurethan und cycloolefinisches Copolymer, einem Ionomerharz, einem wärmeaushärtbaren bzw. wärmevernetzbaren Material vom Typ Polyurethan, ungesättigter Polyester und Ethylen-Vinylacetat-Copolymer oder einer Vereinigung von mehreren Dicken aus ein und demselben oder mehreren dieser Kunststoffe besteht.
  10. Erzeugnis nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der mit dem Kunststoffzusatz ummantelte Umfangsbereich aus einem oder mehreren elastomeren und insbesondere thermoplastischen Materialien besteht.
  11. Verfahren zur Herstellung eines Erzeugnisses nach einem der Ansprüche 1 bis 10, welches das Spritzgießen eines ersten und anschließend mindestens eines zweiten Kunststoffs in eine einzige Form umfasst.
  12. Verfahren nach Anspruch 11, das einen Übergabevorgang durch Drehung des Produkts aus dem Spritzgießen des ersten Kunststoffs von einem ersten Formnest, in welchem zuvor das Spritzgießen des ersten Kunststoffs stattgefunden hat, in ein zweites Formnest, das zum anschließenden Spritzgießen des zweiten Kunststoffs dient, umfasst.
  13. Verfahren zur Herstellung eines Erzeugnisses nach einem der Ansprüche 1 bis 10, welches das Spritzgießen eines ersten Kunststoffs in eine erste Form und anschließend die Übergabe des Produkts dieses Spritzgießens in eine zweite Form, in welcher ein zweiter Kunststoff spritzgegossen wird, umfasst.
  14. Verfahren nach einem der Ansprüche 11 bis 13, in welchem eine/zwei Außenschicht/en, die gegebenenfalls zuvor wärmegeformt worden ist/sind, von einem beliebigen geeigneten Mittel, insbesondere durch Ansaugen und/oder Blasen und/oder einen elektrostatischen Effekt vor dem Spritzgießen des ersten Kunststoffs am Boden der Form festgehalten wird/werden.
  15. Verfahren nach einem der Ansprüche 11 bis 14, das einen anfänglichen Arbeitsgang zur Bildung eines elektrisch leitfähigen Netzes durch Metallsiebdruck umfasst.
  16. Verwendung des Erzeugnisses nach einem der Ansprüche 1 bis 10 als Glasscheibe für Transportfahrzeuge oder Gebäude.
EP99925119A 1998-06-19 1999-06-17 Kunststoffverglasung mit umgossenem kunststoffrahmenelement Expired - Lifetime EP1089876B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9807768A FR2779990B1 (fr) 1998-06-19 1998-06-19 Vitrage en matiere plastique avec ajout de matiere plastique surmoule
FR9807768 1998-06-19
PCT/FR1999/001454 WO1999065678A1 (fr) 1998-06-19 1999-06-17 Vitrage en matiere plastique avec ajout de matiere plastique surmoule

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EP1089876A1 EP1089876A1 (de) 2001-04-11
EP1089876B1 true EP1089876B1 (de) 2006-01-25

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US (1) US6811857B1 (de)
EP (1) EP1089876B1 (de)
JP (1) JP4700804B2 (de)
KR (1) KR100609654B1 (de)
DE (1) DE69929597T2 (de)
ES (1) ES2257863T3 (de)
FR (1) FR2779990B1 (de)
PT (1) PT1089876E (de)
WO (1) WO1999065678A1 (de)

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US6811857B1 (en) 2004-11-02
DE69929597T2 (de) 2006-09-21
JP2002518207A (ja) 2002-06-25
JP4700804B2 (ja) 2011-06-15
EP1089876A1 (de) 2001-04-11
WO1999065678A1 (fr) 1999-12-23
KR20010071504A (ko) 2001-07-28
ES2257863T3 (es) 2006-08-01
FR2779990A1 (fr) 1999-12-24
DE69929597D1 (de) 2006-04-13
FR2779990B1 (fr) 2000-07-21
PT1089876E (pt) 2006-06-30
KR100609654B1 (ko) 2006-08-09

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